Oil sprayer with closing time deviation compensation
A technology of closing time and fuel injector, which is applied in fuel injection control, machine/engine, fuel injection device, etc. It can solve the problems affecting the precise control of fuel injection quantity and the performance of fuel injector, so as to achieve precise control of fuel injection quantity Effect
Active Publication Date: 2013-04-17
WEICHAI POWER CO LTD
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- Abstract
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Problems solved by technology
In this case, if the fuel injection parameters are not revised, it will inevitably affect the precise control of the fuel injection quantity, thereby affecting various performances of the fuel injector
Method used
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Embodiment Construction
[0020] A fuel injector with closing time deviation compensation according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. Like reference numbers refer to like elements throughout the figures.
[0021] figure 2 A functional block diagram of a fuel injector 200 with closing time deviation compensation according to one embodiment of the invention is shown. like figure 2 As shown, the fuel injector 200 with closing time deviation compensation according to the embodiment of the present invention includes a control device 201 , a coil pressurizing device 202 , and a current sensing device 203 . The control device 201 is used to continuously issue pressurization instructions, and each pressurization instruction specifies the power-on time of the controlled voltage pulse. The coil pressurization device 202 receives a pressurization command from the control device, and applies a controlled voltage pulse to th...
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The invention relates to an oil sprayer with closing time deviation compensation. The oil sprayer comprises a control device, a coil pressing device and a current sensing device, wherein the control device is used for continuously sending pressing instructions, and each pressing instruction indicates the power-on time of controlled voltage pulse; the coil pressing device is used for receiving thepressing instructions from the control device and applying the controlled voltage pulse to an electromagnetic valve coil of the oil sprayer according to the pressing instructions; the current sensingdevice is used for measuring current on the electromagnetic valve coil of the oil sprayer and sending the measured current value to the control device; the control device is further used for monitoring current response waveform generated by the controlled voltage pulse corresponding to each pressing instruction on the electromagnetic valve coil of the oil sprayer by using the measured current value so as to measure the armature settling time of the oil sprayer corresponding to each pressing instruction; and the control device is used for calculating the compensation quantity of the power-on time of the controlled voltage pulse specified in the next instruction according to the measured armature settling time of the oil sprayer corresponding to the current pressing instruction.
Description
technical field [0001] The present invention generally relates to the field of fuel injectors, and more particularly relates to a fuel injector with closing time offset compensation. Background technique [0002] In the high-pressure common rail system, the fuel injector is a key component, and the precise control of the fuel injection quantity directly affects the power and economy of the engine. Usually, the control of the fuel injection quantity is carried out by controlling the opening time of the solenoid valve of the fuel injector. Therefore, in order to accurately control the amount of fuel injected by the injector, it is necessary to precisely control the amount of time that the solenoid valve of the injector is open. That is to say, the timing of opening and closing of the solenoid valve of the fuel injector must be obtained precisely. [0003] However, in practice, the exact time point of closing the solenoid valve of the fuel injector is not equal to the time po...
Claims
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IPC IPC(8): F02D41/38F02M63/02F02M51/06
Inventor 佟德辉孙少军李大明刘兴义桑海浪徐文俊
Owner WEICHAI POWER CO LTD